fix server sampling: top k sampler first (#1977)

Co-authored-by: anon <[email protected]>

Author: anon998

examples/server/server.cpp

@@ -325,10 +325,10 @@ struct llama_server_context {
                     id = llama_sample_token_mirostat_v2(ctx, &candidates_p, mirostat_tau, mirostat_eta, &mirostat_mu);
                 } else {
                     // Temperature sampling
+                    llama_sample_top_k(ctx, &candidates_p, top_k, 1);
                     llama_sample_tail_free(ctx, &candidates_p, tfs_z, 1);
                     llama_sample_typical(ctx, &candidates_p, typical_p, 1);
                     llama_sample_top_p(ctx, &candidates_p, top_p, 1);
-                    llama_sample_top_k(ctx, &candidates_p, top_k, 1);
                     llama_sample_temperature(ctx, &candidates_p, temp);
                     id = llama_sample_token(ctx, &candidates_p);
                 }